THANKS a lot guyz... its working!!
Actually I made a mistake in my username. It wasnt "nishanth" it was "hunter1", my bad..
But in my EMAIL( when u 1st register at x10hosting, they send an Email with all your account info), in that Email my Username was "nishanth", but when I logged on to
http://x10hosting.com/panel.php there it said my Username was "hunter1".
I am able to login to the Cpanel with "hunter1" as username, so nvm.
Sorry for the trouble caused.
One more question:-
Is there any way that I can change my username from the present "hunter1" to "nishanth" or "something else"?